fix(deps): update dependency com.google.auth:google-auth-library-credentials to v1.8.0 (#1723)

[![Mend Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.auth:google-auth-library-credentials](https://togithub.com/googleapis/google-auth-library-java) | `1.7.0` -> `1.8.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.8.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.8.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.8.0/compatibility-slim/1.7.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-credentials/1.8.0/confidence-slim/1.7.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/google-auth-library-java</summary>

### [`v1.8.0`](https://togithub.com/googleapis/google-auth-library-java/blob/HEAD/CHANGELOG.md#&#8203;180-httpsgithubcomgoogleapisgoogle-auth-library-javacomparev170v180-2022-06-27)

[Compare Source](https://togithub.com/googleapis/google-auth-library-java/compare/v1.7.0...v1.8.0)

##### Features

-   add build scripts for native image testing in Java 17 ([#&#8203;1440](https://togithub.com/googleapis/google-auth-library-java/issues/1440)) ([#&#8203;923](https://togithub.com/googleapis/google-auth-library-java/issues/923)) ([bbb51ce](https://togithub.com/googleapis/google-auth-library-java/commit/bbb51ce7a9265cb991739cd90e1ccf65675d05dc))
-   Adds Pluggable Auth support (WIF) ([#&#8203;908](https://togithub.com/googleapis/google-auth-library-java/issues/908)) ([c3e8d16](https://togithub.com/googleapis/google-auth-library-java/commit/c3e8d169704943735c6b3df7bd0187f04fdd9aa5))

##### Documentation

-   updates README for Pluggable Auth  ([#&#8203;921](https://togithub.com/googleapis/google-auth-library-java/issues/921)) ([23716b8](https://togithub.com/googleapis/google-auth-library-java/commit/23716b82fb3000f5210bb5604127aad7ef52cb76))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/gax-java).

Author: renovate-bot

pom.xml

@@ -61,7 +61,7 @@
       <dependency>
         <groupId>com.google.auth</groupId>
         <artifactId>google-auth-library-credentials</artifactId>
-        <version>1.7.0</version>
+        <version>1.8.0</version>
       </dependency>
       <dependency>
         <groupId>org.threeten</groupId>